San Francisco 49ers quarterback Colin Kaepernick kicks his leg as he warms up before facing the Denver Broncos during drills at the teams' joint NFL football training camp Wednesday, Aug. 17, 2016 in Englewood, Colo. The Broncos host San Francisco on Saturday in an NFL exhibition football contest.
San Francisco 49ers quarterback Colin Kaepernick kicks his leg as he warms up before facing the Denver Broncos during drills at the teams' joint NFL football training camp Wednesday, Aug. 17, 2016 in Englewood, Colo. The Broncos host San Francisco on Saturday in an NFL exhibition football contest. David Zalubowski AP
San Francisco 49ers quarterback Colin Kaepernick kicks his leg as he warms up before facing the Denver Broncos during drills at the teams' joint NFL football training camp Wednesday, Aug. 17, 2016 in Englewood, Colo. The Broncos host San Francisco on Saturday in an NFL exhibition football contest. David Zalubowski AP